Carbureter.



J. O. BLOMQUIST. CARBURETER.

APPLICATION men NOV. 30. I914.

1,157,363. Patented Oct. 19, 1915.

INVENTOR J 0401 Qfi away/67;.

I TTMIEH chamber '8 to the ll'flu 'll or oove.

oisiTEn STATES PATENT o FIon JOHN OSCAR BLdBIQUIS'I', OF DORCHESTER, MASSACHUSETTS, .ASSIGNOIB. TO MAXIN I'EANUFACTURING COMPANY, A CORPORATIONPF MASSACHUSETTS. '1

CARBURETER.

Speoi'fication of Letters Patent.

Poten'tedOct. 19, 1915 Application filed I \ovembcr 30, 1914. Serial No, 874,703.

valve.

In the dralwing"zl?igure 1 is a. vertical seotion of the improved carbnreter, and Fig. "2 is a section on ihe line of-Fig. 1, looking in the direction of the arrows adjacent-to,,theli11e.' v v present emhodii'nent of the invention oomprisesn casing 1 of approximately drioal lorin' having a'marginal flange u :3

oneend'foi permitting the casing to-be co .nectedto the menillold of a motor, and the 0: mg is provided with a lateral inlet 3, the oil iii-take for the cai'hur'teix )fifitl that the entire area of the "1:" Communicate with the n1ix- V is; with the interior of i, but there is a partition wzll he mi-l eter. V The lower port-ion of the Casing 1 is solid indicated at and there an annular trough or gvoove S at the top of the solid portion, this groove or tro igh being coaxial with the casing; l and being at the partition which in 39th continuation of the l; The lower edge of the partition extends to new the leveljof the top of the solid portion 5 of the casing, and passages d to the trough or depression from a,

V. er 5 portion 5 of the A; series of he 3" said passage the lower end of the solid ism v 7 is provided. the outwardly from he I The lower end. of this chanm. r closed oy a screw threaded plug S lll plug having a arse lcerf for engagement by a -in the iz'ztekeand thebody tool to turn the same, and the ehimbeit is internally threaded as shown forfreeeiving the'plupn' I A passage 10 connects the-chamber 8 with another chamber 11 in anihple'lz, which extends downwardly from the solid ,DOiftibn of the casing at. the oppositeside frointli'e iii-take, and the lower endof the ehd nbe 2f 13 sin'nlgir to'lthe 1.7 ,H

1.1 is also closed by a plu plug before mentioned.

The unperendof the: chamber is formed into a valve seat with w operates a needle valvel l, and 'th l eat her 11 and a. lateral extension .154 ff chamber 16 of the carb'uretenf; T

forms communication betweenthe Chi in-' admitted to'the fuel'cham'ber -16, h inea "S I i of a pipelr', which. leads from alsiiitohlle source ofsup'ply to a nipple 18 i t lower end and at'the center of the' fuel Chamber,

; the pipe being threaded into the sa'idlnipple.

A port 19 forms a coinmuni'on-tionhetween the nipple 18 and. the. fuel chnniber :i d

the lower end offthe port is forni'ed 'intofasent with which coopei'abes a valie QQKOnIthe lower end of a valve stem 21.: A-llo zlt 22'is coni'irtecl with thestem 21 inithe fuel ohliinbeig the float being held on the stern. by

means of lock nuts 2-3, and the lu oper end,

the stem extends through the top-or eover ll of the-fuel chamber, the said site 'on noting as-a guide for guiding the ste n nits movement. The fuel flows by Wa-yof, the

pipe ll'to't-he nipple find-through theport 19; to the fuel chamber. After the fuel toms a predetermined depth governed" .V the position of: the float the fiogtgwill be lifted, thus causing the valve to .clos'efth'e port- The fuel is thus held at ajprefde- 5 provided with a. head 25 forconv V u w VI in manipulatingthe same. lne portion engages mthreaded open- The needle valve '14; 'hefore ',mens externally threaded at its upper direction the relative position of the valve I ing in the form of-a set screw 28, which is and the seal. between theextension and the chamber 11 may be varied.

A sleeve 27 is mounted in the-casing l,

the said sleeve being the throttle valve, and

the lower edge of the sleeve is at the center of the-groove or trough 6, before men tioned. v Astop is provided for limiting the down ward movementof the sleeve) the stop he- .threaded through the bottom of the trough or depression 26 at the in-ta'ke 3,. and a lock nut 29 is. threaded on to the set screw for locking the same in adjusted position.

The inner end of the set screw is in po sition for engagement by the lower end of i the throttle sleeve to limit the downward the sleeve as will be-evident movement thereof, and the arrangement is such that when the lower end of the sleeve engages the upper end of the set screw the said lower end will be spaced slightly above the bottom of the trough. The passages 7 communicate with the trough just inside of tion ofthe drawing. The bar 26 before mentioned, has its inner end provided-with a reduced threaded stem 30, which engages a threaded opening in one side of the s'leeve and the bar extends diametrically of the sleeve. The sleeve is provided with an opening 31 at the oppo- 'site side from the opening for the stem through which the bar passes, and the easopening 31. l

ing 1 has an opening 32 in register with the from an inspecvalve may lie-adjusted to suit conditions by turning the valve in the proper direction. In addition it will not be necessary to flood the carbureter on starting, since the mere act of opening the throttle valve to the level of the fuel will increase the supply of fuel to the carlnneter. Since thereis no resistance or drag to the air because of air valves,

springs and (lash post, the speed of air pastthe nozzles and the suction in the intake manifold is determined by the speed of motor and the opening of the throttle. l sually on quick opening of the throttle at slow motor speed the SNCL-lOH would decrease to a point such that the mixture would he too poor. The high level of the fuel insures a 26 and the otheremi is adapted to engage 'shaft 33 is oscillated the sleeve will bemoved longitudinally of the casing. The sleeve 27,-

is as before stated, the throttle. valve and the supply of fuel to the trough. 6 is controlled by the needle valvell, which is directly'connected with the throttle by means of the bar 26.

The float 22 i to its stern thatfn or ally the fuel will stand in the trough'6 at a higher level than the lower end of the throttle sleeve when the said sleeve rests upon'the stop 28. When the piston of the motor is on the suction stroke, air will be drawn in through the intake and will pass downward beneath'the lower end of the throttle sleeve and through the fuel in the trough, that is, provided that the throttle is below the level of the fuel in the trough and the air laden with vaporized fuel is drawn up through the casi g 1 into the engine.

When'the throttleis opened the needle valve 14 is also opened, and the connection between the throttle valve and the needle arranged with respectthe milling of tliehead. 25 for holding the set screw against. accidental. displacement.

I claim 1 .l. A carburetor comprising a substantially cylindrical casing having its lower end closed to for-n1 a mixing chan'ili r and adapt ed for connection at the opposite end with the engine. said casing having an annular trough at the closed end coaxial with they casing for receiving the fuel, andjhai'fng. a

lateral air inletat the trough and connnnnica ting with the iinixin'g chamhera't the outer side of the trough, the carbngeter having a fuel chanihe'r, and a fioat valve for re .3115 mg the fuel in the chamber at a [)lfidfitiflilt! :l level, said carbon-rte? hav 1;: an nuxil 1?}, fuel chamber at the c d e municating with the t nigh and with the fuel chamber, a needle valve contrt'iiling the communication between the auxiliary and main fuel charntaars, a throttle sleeve mount.- ed for movement in the casing toward and from the trough and having its lower end at the center of the trough, means for moving the sleeve and a connection between the sleeve and the needle valve for moving the valve in the same direction as the sleeve, said connection comprising a bar arranged transversely of the sleeve, the casing having a slot through which the bar extends, said her having an internally threaded opening, and the needle valve having a threaded 'por-- tion for engaging the opening.

2. A carbureter comprising a substantially cylindrical casing having its lower end closed to form a mixing chamber and adaptnd and 6011' 'ed for connection at the opposite end with casing for receivingthe fuel, and having a lateral air inlet at the trough and communilevel, said carburetor having an auxiliary fuel chamber at the closed end andcommunicating with the trough and with the 10 fuel chamber,-aneedle valve controlling the communication between the auxiliary and the main fuel chambers, a throttle sleeve mounted for-movement in the casing toward and from the troughand having its lower 'end at the center of the trough, means for moving the sleeve and a connection between the sleeve and the needle valve for moving the valve in the same direction as the sleeve, said connection being adjustable, and an adjustable stop for limiting the downward movement of the throttle sleeve.

'3. A. earbureter comprising a substantially cylindrical casing having its lower end closed to form a mixing chamber and adapt ed for connection at the opposite end. with the engine, said casing having an annular trough at the closed end coaxial with. the can ing for receiving the fuel, and having a lateral air inlet at the trough and communicai; ing with the mixing chamber at the outer side of the trough, the carburetor having a 'fuel chamber, and a float valve forvretaining he fuel in the chamber at a predetermined evel, said carbureter having an auxiliary fuel chamber at the closedvend and communicating with the trough and with the fuel chamber, a needle valve controlling the communication between the auxiliary and the mainfuel chambers, a throttle sleeve mount- 40 ed for movement in the casing toward and from the trough and having its lower end at the center of the trough, and means for moving the sleeve and a connection between the sleeve and the needle valve for moving the valve in the same direction as the sleeve said connection being adjustable, 4. A carburetor comprising a substantially cylindrical casing having its lower end closed to form a mied for connection at the opposite end with the engine, said casing having air-annular trough at the closed end coaxial with the casing for receiving the fuel, and having a lateral air inlet at the trough and communi 66 eating with themixing chamber at the outer side of the trough, the carburetor having a fuel chamber, and a float valve for retaining the fuel in the chamber at a predetermined level, said carburetor having anauxiliary fuel chamber at the closed end and commu- -nicating with thetrough and'with the fuel.

chamber, a valve forcontrolling the communication between the auxiliary and the main fuel chambers, a throttle sleeve mounted to move in the casing toward and from the .ng chamber and adapt.

trough, said trough being so arranged that the lower end of the sleeve will dip therein, and a connection between the sleeve and the valve, said connection being adjustable.

5. A carburetercomprising a substantially cylindrical casing having its lower end closed to form a mixing chamber and adapted for connection at the opposite end with the en gine, said casing having an annular trough at the closed end coaxial with the casing for receiving the fuel, and having a lateral air inlet at the trough and communicating with the mixing chamber at the outer side of the trough, the carbureter hav-inga fuel chamber, and a. float valve for retaining the fuel 3 in the chamber at a predetermined level, a communication between the fuel chamber and the trough, a valve for controlling the said communiqgiion, a throttle sleeve mounted for sliding movement in the casing and having its lower end registering with the trough and adapted to dip therein when the sleeve is in closed position, means for moving the sleeve, and a connection between the sleeve and the valve, said connection being justable, and compri 1g a banal-ranged. uiarnetr ally the sleeve, the casing having opening through which one end of the extends, and the valve'having a stem having a threaded engagement with the bar,

6. A carburetor comprising a substantially cylindrical casing having its lower end closed to form a mixing chamber and adapt ed for connectionat the opposite end with ice the engine,-said casing having an annular trough at the closed end coaxial with the casing for receiving the fuel, and having a lat eral air inlet at the trough and communicating with the mixing chamber at the outer 105 side of the trough, the carburetor having a fuel chamber, and a float valvefor retaining the fuel in the chamber at a predetermined level, a communication between the fuel chamber and the trough, a valve for control- 110 ling the said communication, a throttle mounted for sliding movement in the casing and having its lower end registering with the trough and adapted to dip therein when the sleeve is in closed position, means 115 for moving the sleeve, and a connection between the sleeve and the valve, said conncc tion being adjustable.

7. A carburetor comprisig an approximately cylindrical mixing chamber ha ing one end closed and having an annular fuelv trough and having a lateral inlet at the outer edge of the trough, a throttle sleeve movable in the mixing chamber and adapted to dip into the fuel in the trouglrat one end, a valve for controllingthe supply of fuel to the trough, and a connection between the sleeve and the valve for moving the valve in the same direction as the sleeve.

8, mrbureter, comprising a mixing chamber having one end closed, and havinga the fuel supply valve for causing the said fuel 'or aspirating trough at the said end, valves to move together.

an inlet at the trough, a throttle valve movable in the mixing chamber and adapted to JOHN OSCAR BLOMQUIST' dip into the fuel trough, a valve for control- Witnesses:

ling the supply of fuel to the trough, and a FRANK L. SMITH,

connection between the throttle valve and HARRY A. PATTERSON. 

